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fix(stream): honor client network-caching in the M3U playlist

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playlistHandler hardcoded #EXTVLCOPT:network-caching=30000, so VLC pre-buffered
~30 s before starting playback even on a fast, range-served LAN/Tailscale
source — the "VLC loads the whole movie before playing" regression.

Read the value from a networkCaching query param (clamped 500–60000ms) and
default to 3000 when absent. The web sends a network-aware value (small on
LAN/Tailscale, larger on the CF funnel); older web clients fall back to the
modest default instead of the old 30 s wall.
This commit is contained in:
Deivid Soto 2026-06-02 19:42:05 +02:00
parent f0ac905fdb
commit f7ea06c70a
1 changed files with 16 additions and 1 deletions
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17
internal/engine/stream_server.go
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@ -790,6 +790,21 @@ func (ss *StreamServer) playlistHandler(w http.ResponseWriter, r *http.Request)
resumeSec := sanitize(q.Get("resumeSec"))
title := sanitize(q.Get("title"))
streamURL := q.Get("streamUrl")
// VLC network buffer (ms). The web sends a network-aware value (small on
// LAN/Tailscale, larger on the CF funnel); clamp to a sane range. Older web
// clients that don't pass it get a modest default — the old flat 30000 made
// VLC pre-buffer ~30 s before playback even on a fast, range-served source.
networkCaching := 3000
if v := sanitize(q.Get("networkCaching")); v != "" {
if n, err := strconv.Atoi(v); err == nil {
if n < 500 {
n = 500
} else if n > 60000 {
n = 60000
}
networkCaching = n
}
}
// Only accept http(s) URLs to prevent file:// or other URI schemes in the playlist.
if streamURL != "" && !strings.HasPrefix(streamURL, "http://") && !strings.HasPrefix(streamURL, "https://") {
streamURL = ""
@ -819,7 +834,7 @@ func (ss *StreamServer) playlistHandler(w http.ResponseWriter, r *http.Request)
if resumeSec != "" && resumeSec != "0" {
b.WriteString(fmt.Sprintf("#EXTVLCOPT:start-time=%s\n", resumeSec))
}
b.WriteString("#EXTVLCOPT:network-caching=30000\n")
b.WriteString(fmt.Sprintf("#EXTVLCOPT:network-caching=%d\n", networkCaching))
b.WriteString(streamURL + "\n")
w.Header().Set("Content-Type", "audio/x-mpegurl")